. Notes on the life history of British flowering plants. Botany; Plant ecology. 220 BRITISH FLOWERING PLANTS chap. the pollen, while flies come principally to lick the layer of honey. From the position of the flowers pollen must often fall from one flower on to the stigma of another. I was long puzzled as to the reason for the great diff'erence in the form of the leaves of our two species of Viburnum, but it may perhaps be explained by the following suggestions, which I brought forward in a paper read before the Linnean Society in 1890,^ and in my book On Buds and Stipules. V. Lantmia has. Fig
. Notes on the life history of British flowering plants. Botany; Plant ecology. 220 BRITISH FLOWERING PLANTS chap. the pollen, while flies come principally to lick the layer of honey. From the position of the flowers pollen must often fall from one flower on to the stigma of another. I was long puzzled as to the reason for the great diff'erence in the form of the leaves of our two species of Viburnum, but it may perhaps be explained by the following suggestions, which I brought forward in a paper read before the Linnean Society in 1890,^ and in my book On Buds and Stipules. V. Lantmia has. Fig. 146.—Viburnum Opulus. Shoot, with flower and fruit. leathery leaves, tomentose on the nerves, which, more- over, are when young protected by a thick felt of stellate hairs. V. Opulus, on the contrary, has more delicate leaves, glabrous above, pubescent beneath. They are protected in the bud by the lower leaves, which are leathery, and serve merely for this purpose. For facility of packing in the confined space of the bud they are folded up, and hence the lobed form. They also present curious stipules or stipuliform appendages, which fill up and thus utilise a space at the base of the bud which would otherwise be empty.^ The leaf-stalks bear one or more cups which secrete nectar. This is also ' Journal Linnerm Soc. (Bot.) xxviii. ^ This is described more fully in my Buds and Stipules, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lubbock, John, Sir, 1834-1913. London, New York, Macmillan and Co. , Ltd.
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